US4653015A - Apparatus for generating a time duration signal - Google Patents

Apparatus for generating a time duration signal Download PDF

Info

Publication number
US4653015A
US4653015A US06/712,339 US71233985A US4653015A US 4653015 A US4653015 A US 4653015A US 71233985 A US71233985 A US 71233985A US 4653015 A US4653015 A US 4653015A
Authority
US
United States
Prior art keywords
counting
counter
time duration
value
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/712,339
Other languages
English (en)
Inventor
Rolf Daumer
Winfried Klotzner
Manfred Schenk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US4653015A publication Critical patent/US4653015A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
    • H03K23/64—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two
    • H03K23/66—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a variable counting base, e.g. by presetting or by adding or suppressing pulses
    • H03K23/665—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a variable counting base, e.g. by presetting or by adding or suppressing pulses by presetting

Definitions

  • the present invention relates to an apparatus for generating a time duration signal, in particular for controlling fuel metering or ignition processes in internal combustion engines.
  • the apparatus utilizes a computer.
  • A is the respective initial value of the counter
  • fcl is the counting frequency
  • k indicates the total number of counting processes.
  • the total time is thus composed of the sum of various identical individual time ranges A/fcl. In the known apparatus, this initial value A is first computed, and then the total number k of required counting processes.
  • the expenditure for hardware is not insubstantial, since in consideration of the respective predetermined initial value of the counter, an intermediate memory for this initial value is required.
  • the expenditure for hardware should preferably be as low as possible, while a possibly somewhat greater expenditure for software might be more likely to be acceptable.
  • the apparatus according to the present invention for generating a time duration signal has the advantage of less expenditure for hardware than the apparatus known in the prior art. This is achieved while maintaining the same precision and basically without increased computer time.
  • FIG. 1 is a circuit diagram of an apparatus according to the prior art
  • FIGS. 2a-2d illustrate the associated pulse diagrams for the apparatus of FIG. 1;
  • FIG. 3 is an exemplary embodiment of the apparatus according to the invention.
  • FIGS. 4a-4d illustrate the associated pulse diagrams for the apparatus of FIG. 3.
  • FIG. 5 is an exemplary embodiment with a software counter.
  • the exemplary embodiments relate to control apparatus for internal combustion engines, and in particular to the portion of the injection signal generator circuits coming last in terms of signals.
  • the signal processing is effected digitally and under the control of a computer.
  • FIG. 1 which is restricted to the most essential features, shows a number-to-time converter as found in the prior art.
  • the computer 10 includes a data bus 12, which leads via an intermediate memory 13 to the counter state input 14 of a downward counter 15.
  • a control bus line 16 of the computer 10 is connected to both the first input of an OR gate 17 and to the setting input of an RS flip-flop 18.
  • the desired injection time signal ti in the embodiment according to FIG. 1 appears at the non-inverting output of the flip-flop 18, and it is delivered to a subsequent driver circuit (not shown) for the trigger signal of an injection valve.
  • the counter 15 has, in addition to the data input 14, a charging input 20, a counting signal input 21, a CI input 22 and an overflow output 23.
  • the charging input 20 is coupled with the output of the OR gate 17. Both the second input of the OR gate 17 and the counting input of a subsequent downward counter 25 are connected to the overflow output 23.
  • the initial counter state of the downward counter 25, which has a value k, likewise arrives from the computer 10 via a data bus line.
  • the output signal of this counter 25 is an overflow signal at the overflow output 26, which is delivered via an inverter 27 to the reset input of the flip-flop 18.
  • the flip-flop 18 is also connected to the CI input 22 of the counter 15.
  • fcl is the counting frequency of the counter 15.
  • an intermediate memory 13 must be included for the respective initial value A, and it is characteristic for this circuit layout that the total possible counting range of the counter 15 cannot always be fully exploited.
  • FIG. 3 shows the apparatus for generating a time duration signal according to the invention, which is less expensive in terms of its component elements than the apparatus of FIG. 1. Identical components and identical signal lines are indicated by identical reference numerals. It may be seen that the intermediate memory 13 and the OR gate 17 of FIG. 1 are absent here. Otherwise there is no fundamental difference.
  • the counting processes which now follow pass through the total numerical range of the counter 15 (see diagram b in FIG. 4) and the counting ends whenever a predetermined number of overflows has occurred, as in the subject of FIG. 1.
  • the time duration of the output signal of the flip-flop 18 is inversely proportional to the counting frequency of the counter 15. For forming injection times, this counting down frequency is generally kept constant. If on the other hand it is intended to ascertain angular positions based on a particular reference marking, for instance to trigger an ignition process, then it is appropriate to select the counting frequency in accordance with the rpm of the crankshaft or camshaft. In this manner, an angular setting is attained via an (rpm-dependent) time determination.
  • the above-described apparatus shown in FIG. 3 is distinguished by its simple design, which is particularly advantageous when production in great quantity is required. Furthermore, the counter 15, which is included in the apparatus in any case, is fully exploited in terms of its available output.
  • a further savings in hardware expenditure is possible if the counter 25 in the exemplary embodiment shown in FIG. 3 is replaced by a software counter in computer 10 (see FIG. 5).
  • the overflow signal at the output 13 of the counter 15 then serves as an interrupt signal.
  • the reset input of the flip-flop 18 must also be provided in good time by means of a control signal 19 from computer 10, so that at the correct state k of the software counter the next overflow of the counter 15 will cause the resetting of the flip-flop 18, thus terminating the time ti.

Landscapes

  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electronic Switches (AREA)
  • Electrical Control Of Ignition Timing (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
US06/712,339 1981-03-19 1985-03-15 Apparatus for generating a time duration signal Expired - Lifetime US4653015A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813110683 DE3110683A1 (de) 1981-03-19 1981-03-19 "einrichtung zum erzeugen eines zeitdauersignals"
DE3110683 1981-03-19

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US06357116 Continuation 1982-03-11

Publications (1)

Publication Number Publication Date
US4653015A true US4653015A (en) 1987-03-24

Family

ID=6127702

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/712,339 Expired - Lifetime US4653015A (en) 1981-03-19 1985-03-15 Apparatus for generating a time duration signal

Country Status (4)

Country Link
US (1) US4653015A (enrdf_load_stackoverflow)
JP (2) JPS57165646A (enrdf_load_stackoverflow)
DE (1) DE3110683A1 (enrdf_load_stackoverflow)
GB (1) GB2095443B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5126944A (en) * 1988-11-17 1992-06-30 Nec Corporation Data processing apparatus for producing in sequence pulses having variable width at output ports

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0183147U (enrdf_load_stackoverflow) * 1987-11-26 1989-06-02
DE4020652C2 (de) * 1990-06-29 1999-05-27 Bosch Gmbh Robert Elektronisches System zur Ausgabe eines Zeitdauersignals

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4073270A (en) * 1975-07-02 1978-02-14 Nippondenso Co., Ltd. Electronically-controlled fuel injection system
US4178893A (en) * 1977-07-19 1979-12-18 Toyota Jidoshi Kogyo Kabushiki Kaisha Ignition control apparatus for an internal combustion engine
US4250858A (en) * 1978-08-09 1981-02-17 Robert Bosch Gmbh Input-output unit for microprocessor controlled ignition or injection systems in internal combustion engines
US4267810A (en) * 1978-06-07 1981-05-19 Robert Bosch Gmbh Control system for control of repetitive events, e.g. ignition, fuel injection, in internal combustion engines
US4327687A (en) * 1979-06-09 1982-05-04 Robert Bosch Gmbh Timing system for process control in internal combustion engines
US4354239A (en) * 1979-03-15 1982-10-12 Nissan Motor Company, Limited Fuel injection control system for an internal combustion engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5228716A (en) * 1975-08-30 1977-03-03 Shinagawa Tetsukoujiyou:Kk Fabrication process carbon steel tanks with large diameter
DE2850534A1 (de) * 1978-11-22 1980-06-04 Bosch Gmbh Robert Einrichtung, insbesondere zum steuern der zuend- und/oder kraftstoffeinspritzvorgaenge bei brennkraftmaschinen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4073270A (en) * 1975-07-02 1978-02-14 Nippondenso Co., Ltd. Electronically-controlled fuel injection system
US4178893A (en) * 1977-07-19 1979-12-18 Toyota Jidoshi Kogyo Kabushiki Kaisha Ignition control apparatus for an internal combustion engine
US4267810A (en) * 1978-06-07 1981-05-19 Robert Bosch Gmbh Control system for control of repetitive events, e.g. ignition, fuel injection, in internal combustion engines
US4250858A (en) * 1978-08-09 1981-02-17 Robert Bosch Gmbh Input-output unit for microprocessor controlled ignition or injection systems in internal combustion engines
US4354239A (en) * 1979-03-15 1982-10-12 Nissan Motor Company, Limited Fuel injection control system for an internal combustion engine
US4327687A (en) * 1979-06-09 1982-05-04 Robert Bosch Gmbh Timing system for process control in internal combustion engines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5126944A (en) * 1988-11-17 1992-06-30 Nec Corporation Data processing apparatus for producing in sequence pulses having variable width at output ports

Also Published As

Publication number Publication date
DE3110683C2 (enrdf_load_stackoverflow) 1990-06-07
GB2095443B (en) 1985-10-23
DE3110683A1 (de) 1982-09-30
JPH0558855U (ja) 1993-08-03
JPH03497B2 (enrdf_load_stackoverflow) 1991-01-08
JPS57165646A (en) 1982-10-12
GB2095443A (en) 1982-09-29

Similar Documents

Publication Publication Date Title
US4250858A (en) Input-output unit for microprocessor controlled ignition or injection systems in internal combustion engines
US4204256A (en) Input-output unit for a microprocessor engine control system
US4519038A (en) Optimizing spark timing control apparatus and method
US4280189A (en) Input signal processor used in electronic engine control apparatus
US4099495A (en) Method and apparatus to determine the timing of a periodically repetitive event with respect to the position of a rotating body, and more particularly ignition timing, fuel injection timing, and the like, in automotive internal combustion engines
US4282573A (en) Processor interrupt device for an electronic engine control apparatus
US4377996A (en) Ignition timing control method and system
US4044235A (en) Method and apparatus for determining smooth running operation in an internal combustion engine
EP0024733A2 (en) Method and system for operating an internal combustion engine at maximum torque under varying operating conditions
US4414946A (en) Control system for an operating event in a vehicular power train
US4242728A (en) Input/output electronic for microprocessor-based engine control system
US4276600A (en) Oxygen sensor feedback loop digital electronic signal integrator for internal combustion engine control
US4209829A (en) Digital controller for fuel injection with microcomputer
US4277829A (en) Error preventing device for an electronic engine control apparatus
US4649888A (en) Ignition control apparatus for internal combustion engines
US4740915A (en) Method of controlling a microprocessor to monitor input signals at irregular mutually intersecting intervals
US4354239A (en) Fuel injection control system for an internal combustion engine
US4312038A (en) Electronic engine control apparatus having arrangement for detecting stopping of the engine
US4254744A (en) Method and apparatus for measuring air quantity in relation to engine speed
US4290400A (en) Closed loop fuel control system for an internal combustion engine
US4573347A (en) Apparatus for measuring fuel injection advance angle in diesel engine
US4653015A (en) Apparatus for generating a time duration signal
US4862369A (en) Electronically-controlled fuel injection system
GB1594383A (en) Digital computing arrangement for calculating the optimum air/fuel mixture for a carburettor-type internal combustion engine
US4711218A (en) Acceleration enrichment fuel control

Legal Events

Date Code Title Description
FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 12